【摘要】：對(duì)數(shù)螺旋錐齒輪本身就是為了解決目前螺旋錐齒輪嚙合線上螺旋角不等而設(shè)計(jì)的一種新型的螺旋錐齒輪,主要應(yīng)用在高速重載的精密機(jī)床、車(chē)輛傳動(dòng)和工程機(jī)械等領(lǐng)域中,這就要求對(duì)數(shù)螺旋錐齒輪在承載能力和傳動(dòng)效率等方面達(dá)到比較高的水平。螺旋錐齒輪的齒廓修形可以直接影響了該齒輪的動(dòng)態(tài)性能和齒面強(qiáng)度,通過(guò)研究發(fā)現(xiàn),對(duì)螺旋錐齒輪進(jìn)行齒廓修形可以提高螺旋錐齒輪的接觸疲勞強(qiáng)度、降低了最大嚙合應(yīng)力,達(dá)到了齒輪設(shè)計(jì)中消除嚙合沖擊、減少噪音和提高齒輪使用壽命的效果,具有重要工程應(yīng)用價(jià)值。論文將有限元應(yīng)用到傳統(tǒng)的齒輪齒廓修形方式中,以齒輪接觸有限元理論為基礎(chǔ),結(jié)合對(duì)數(shù)螺旋錐齒輪齒形原理和齒輪嚙合理論,建立對(duì)數(shù)螺旋錐齒輪三維模型,并在ANSYS Workbench軟件中建立有限元齒輪接觸分析模型,在對(duì)數(shù)螺旋錐齒輪加載接觸分析的基礎(chǔ)上,進(jìn)行齒廓修形研究與修形后的嚙合分析。本課題主要研究?jī)?nèi)容可分為四個(gè)部分:首先,敘述螺旋錐齒輪的應(yīng)用現(xiàn)狀,針對(duì)對(duì)數(shù)螺旋錐齒輪,進(jìn)行齒形原理的研究并掌握該齒輪的參數(shù)關(guān)系,為對(duì)數(shù)螺旋錐齒輪的加載接觸分析提供理論依據(jù)。其次,對(duì)建好的參數(shù)化三維齒輪進(jìn)行模型導(dǎo)入,并對(duì)其進(jìn)行添加材料屬性、創(chuàng)建接觸對(duì)和網(wǎng)格劃分,在此基礎(chǔ)上通過(guò)ANSYS Workbench軟件為對(duì)數(shù)螺旋錐齒輪進(jìn)行承載接觸分析,研究其嚙合時(shí)接觸軌跡、最大嚙合應(yīng)力、最大接觸應(yīng)力以及彈性變形等情況。第三,根據(jù)螺旋錐齒輪的嚙合原理,通過(guò)對(duì)數(shù)螺旋錐齒輪承載接觸分析中所得數(shù)據(jù),對(duì)該齒輪進(jìn)行齒廓修形技術(shù)的研究,推導(dǎo)出相應(yīng)的齒廓修形曲線,提出齒輪的修形參數(shù);最后,為修行后的對(duì)數(shù)螺旋錐齒輪進(jìn)行重新建模,進(jìn)行修形后的齒輪承載接觸分析,對(duì)比齒廓修形前后的嚙合特性,通過(guò)齒輪分析得出,本次對(duì)對(duì)數(shù)螺旋錐齒輪的齒廓修形是有效的,修形后使得嚙合應(yīng)力的波動(dòng)范圍降低,提高了齒輪傳動(dòng)性能,為以后對(duì)數(shù)螺旋錐齒輪的優(yōu)化設(shè)計(jì)與應(yīng)用提供了有效的理論依據(jù)。
[Abstract]:Logarithmic spiral bevel gear is a new type of spiral bevel gear designed to solve the problem of different helix angles on the meshing line of spiral bevel gear. It is mainly used in the fields of high speed and heavy load precision machine tool, vehicle transmission and construction machinery, etc. This requires logarithmic spiral bevel gears in the bearing capacity and transmission efficiency to achieve a relatively high level. The tooth profile modification of spiral bevel gear can directly affect the dynamic performance and tooth surface strength of spiral bevel gear. It is found that the tooth profile modification of spiral bevel gear can improve the contact fatigue strength of spiral bevel gear and reduce the maximum meshing stress. It has achieved the effect of eliminating meshing impact, reducing noise and prolonging the service life of gear in gear design, which has important engineering application value. In this paper, the finite element method is applied to the traditional gear profile modification. Based on the finite element theory of gear contact, the three-dimensional model of logarithmic spiral bevel gear is established based on the theory of logarithmic spiral bevel gear tooth profile and gear meshing theory. Based on the contact analysis of logarithmic spiral bevel gear, the tooth profile modification and meshing analysis after modification are carried out on the basis of the contact analysis of logarithmic spiral bevel gear under loading. The contact analysis model of finite element gear is established in ANSYS Workbench software. The main research contents of this paper can be divided into four parts: firstly, the application status of spiral bevel gear is described, according to logarithmic spiral bevel gear, the principle of tooth shape is studied and the parameter relation of the gear is grasped. It provides a theoretical basis for the load contact analysis of logarithmic spiral bevel gears. Secondly, the parameterized three-dimensional gear model is imported, and the material attribute is added to it to create contact pair and mesh partition. On this basis, the load-bearing contact analysis of logarithmic spiral bevel gear is carried out by ANSYS Workbench software. The contact trajectory, maximum meshing stress, maximum contact stress and elastic deformation are studied. Thirdly, according to the meshing principle of spiral bevel gear, through the data obtained from the contact analysis of logarithmic spiral bevel gear, the gear profile modification technology is studied, the corresponding tooth profile modification curve is deduced, and the gear profile modification parameters are put forward. Finally, in order to re-model the logarithmic spiral bevel gear after modification, the bearing contact analysis of the modified gear is carried out, and the meshing characteristics before and after the tooth profile modification are compared, and the results are obtained by the gear analysis. The modification of the tooth profile of logarithmic spiral bevel gear is effective. After the modification, the fluctuation range of meshing stress is reduced, and the transmission performance of gear is improved. It provides an effective theoretical basis for the optimal design and application of logarithmic spiral bevel gear in the future.
【學(xué)位授予單位】：內(nèi)蒙古科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類(lèi)號(hào)】：TH132.41

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